5c891a3fe32804234f620b5347bbd4d0c0dbf4a07ef713a1e17885f12f1d40ce

Analysis

max time kernel
15s
max time network
153s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23/02/2024, 04:31

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General

Target

2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe
Size

39KB
MD5

2996499c4496c7443d571ffcbe8a5abb
SHA1

42a03223b8faaf4f5f6082e5d83edcc6cf7dd518
SHA256

5c891a3fe32804234f620b5347bbd4d0c0dbf4a07ef713a1e17885f12f1d40ce
SHA512

ea96eeecf264a3bedddd1ec0cf74507d5386fa0254e3178aa8e9c11119ae18931d97eb2a53c1de5fdb6ccdda48822d2fca149a1c859fc30af895f5fc234e009d
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlxujsFwR:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaJR

Score

9^/10

discovery

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral1/files/0x000d00000001223a-10.dat	CryptoLocker_rule2

Executes dropped EXE 1 IoCs

pid	Process
2996	retln.exe

Loads dropped DLL 1 IoCs

pid	Process
2296	2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe

Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
discovery

Network Service Discovery
T1046
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2296	2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe
2996	retln.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 2996	2296	2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe	28
PID 2296 wrote to memory of 2996	2296	2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe	28
PID 2296 wrote to memory of 2996	2296	2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe	28
PID 2296 wrote to memory of 2996	2296	2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_2996499c4496c7443d571ffcbe8a5abb_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of UnmapMainImage
  PID:2996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
39KB

MD5
03bac99a7d9552b177e615de69e6aca0

SHA1
f0534c0725c49a3c9ff41ceac05bcbfcae0e7984

SHA256
78f6315d6f52734f5cad6736ce09bfa7cbd987be95e4aabc461c6ad400a229b8

SHA512
7a369b9272fc35a5ee735aa441798f36ec20158f950cc01cc74aabd9c37315110501583914c47e9bdff21ede3170440eba5ba5cf7812e3316ae5547d864b3ea5

Download Submit
memory/2296-0-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2296-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2296-8-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/2996-19-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download